Sash-lock.



No. 847,600. IPIATENTED MAR.19, 1907..

0.. PEARSON & 'c. E. LINDQUIST.

SASH LOOK.

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SASH-LOCK- Specification of Letters Patent.

Patented March 19, 1907.

Application filed May '7, 1906. Serial No. 315,490.

To all whom it Ina/y concern:

Be it known that we, OKE PEARSON and CARL E. LIND UIsT, citizens of'theUnited States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in a Burglar-Proof Sash-Lock, of which the following is a specification.

This invention relates to improvements in a device to be used for securing the meetingrails of the upper and lower sashes of a window in locked relation with respect to one another; and it consists in' certain peculiarities of the construction, novel arrangement, and operation of the various parts thereof, as will be hereinafter more fully set forth and specifically claimed.

The objects of our invention are to provide a sash-lock which shall be simple and inexpensive in construction, strong, durable, effective in operation, and so made that it may be easily attached to the sashes or removed therefrom, to furnish a sash-lock which may be used for locking the sashes against their movement when in their normal positions for closing the window or for locking them, so as to permit of a restricted movement of either the upper or lower sash, or both of them, for the purpose of ventilation, yet which will prevent access to the room through the window of a burglar or marauder.

Various other objects and advantages of the invention will be disclosed in the subjoined description and explanation.

In order to enable others skilled in the art to which our invention pertains to make and use the same, we will now proceed to describe it, referring to the accompanying drawings, in which Figure 1 is a plan view of parts of the meeting-rails of the upper and lower sash of a window, showing our improved sash-lock in position thereon with its parts arranged to secure the sashes together, yet to permit of a resticted movement thereof. Fig. 2 is a perspective view of a portion of the meetingrails of the upper and lower sashes and a part of the window-panes therefor, showing the sash-lock in place thereon and illustrating the said rails secured together by means of the look at the limit of their restricted movement. Fig. 3 is a detached view, in side elevation, of the slotted block which carries the locking-lever. Fig. 4 is a plan view thereof,

showing the lever removed. Fig. 5 is a view, partly in section and partly in elevation, taken on line 5 5 of Fig. 3 looking in the direction indicated by the arrows, but showing the members of the lock secured to the sash-rails and the locking-lever in position to secure the sashes together. Fig. 6 is an inner end view of the engaging block or memher for the locking-lever and extensible connection for the two sashes. Fig. 7 is a plan view thereof. Fig.8 is a detached longitudinal sectional view of the locking-lever. Fig. 9 is a perspective view thereof, showing its spring in position. Fig. 10 is a face view of the extensible connection for the two sashes; and Fig. 11 is a side view thereof, showing its members folded together.

Like numerals of reference refer to corresponding parts throughout the different views of the drawings.

The reference-numeral 15 designates the lower rail of the upper sash and the reference numeral 16 the upper rail of the lower sash, each of which sashes carry panes 17 of glass, as usual, and said rails have their adjacent edges beveled, as shown in Figs. 2 and 5, in order that they may form a close joint when the sashes are in their normal positions for closing the window. Secured longitudinally on the upper surface of one of the rails, usually the rail 15, at about its, middle, is a block 18, which has a perimetral flange 19 at its lower portion provided with openings 20 for the reception of screws 21 to be used. for securing the block in position on the rail. This block is provided with a longitudinally-extending cavity 22, with which communicates a longitudinal slot 23, formed in the front face of the block, and which slot extends from near one of the ends of the block to the other end thereof. At one of its ends the slot 23 has an upward extension 2 1, which communicates with a T-shaped slot or opening 25 in the upper surface of the block 18, as is clearly shown in Figs. 1 and 4 of the drawings. The upper portion of that end of the block 18 in which the transverse opening 25 is formed is also provided with a longitudinally-extending groove 26 for the reception or engagement of a spring 27, which is secured at one of its ends to the lower surface of the locking-lever 28 and has its free end bent upwardly alongside of the handle 29', with which said lever is provided near one of its ends. This lever is secured, by means of a pivot 30, to the upper surface of that end of the block 18 opposite the end thereof having the transverse opening therein and has near its pivot end a reduced portion 31,which forms a slightly-dovetailed shoulder 32 to engage a similarly-formed shoulder 33, which extends across the upper surface of the block 18 and is formed there-on by reducing a portion of said block. Each of the shoulders 32 and 33 are formed on an arc of a circle the center of which is the pivot 30, which connects the lever 28 and the block.

Secured transversely on one of the sashrails, usually the rail 16, at about its middle, is an engaging block 34, which has a perimetral flange 35 at its lower portion provided with openings 36 for the passage of screws 37 used for securing said block to its rail. On its inner end the block 34 is provided with a button 38, which has an elongated head, as shown in Figs. 6 and 7, for engagement with one of the members of the extensible connection, as will be presently explained. The outer portion of the block 34 is formed on its upper surface with a groove 39 for the reception or engagement of the spring 27 when the locking-lever 28 is turned to the position shown in Figs. 1 and 5 of the drawings. That end of the block 34 opposite its end in which the groove 39 is formed is provided with a horizontally-disposed. plate or portion 40, which projects over the inner end of said block, or that end thereof adjacent to the block 18, and the outer edge 41 of said plate is formed on an arc of a circle with the pivot 30 for the center thereof and is dovetailed, as shown, to engage the dovetailed shoulder 32 on the locking-lever.

The extensible connection which unites the blocks 18 and 34, so as to permit a restricted movement of the sashes, is shown in Figs. 1, 5, 10, and 11 of the drawings as consisting of three links 42, 43, and 44, pivotally secured together; but it will be understood that we may employ one or more of said links, as may be desired. The free or outer end of the link 42 is provided with an elongated opening 45 of a shape to correspond with the button-head 38 on one end of the block 34, through which opening the said buttonhead may be passed. The outer or free end of the link 44 is provided with a headed projection 46, which is adapted to be inserted through the T-shaped opening 25 in the block 18, so that the contracted portion of said projection may rest and operate in the slot 23 of said block. The pivoted end of the link 42 is provided with a lip 47, which is turned inwardly to engage a recess 48 in one of the pivoted ends of the link 43, so that the links 42 and 43 will be held against movement in but one direction, as will be understood by reference to Fig. 10 of the drawings. That end of the link 44 on which the headed projection 46 is located is formed with a lateral extension 50, which overlaps the end of the link 43 and the projection 47 on the link 42 or upper link when folded.

In securing the device in place on the sash rails the blocks 18 and 34 are preferably secured to the rails 15 and 16, respectively, as shown in Figs. 1, 2, and 5 of the drawings, when by raising the lower sash slightly and placing the extensible connection or link 42 tliereol in a horizontal position the headed button 38 on the block 34 may be passed through the opening 45 in the upper end of the link 42, and the headed projection 46 on the link 44 can be inserted through the T-shaped opening 25 into the slot 23 of the block 18, when by lowering the lower sash until its meeting-rail is flush with the meeting-rail of the upper sash the locking-lever 28 may be turned from the position shown in Fig. 1 to that illustrated in Fig. 2, when it is apparent that the rails 15 and 16 may be caused to pass each other until they are restricted in their movements by reason of the extensible connection, which will hold them at a sullicient distance apart to permit ven tilation of the room, yet will prevent them being moved further apart, so as to admit the entrance of a burglar or other person. In the operation of moving the sash-rails 15 and 16 apart it is apparent that the headed projection 46 will slide in the slot 23 from the open end thereof to its closed end and that the link 42 of said extension will turn on the headed projection 38, so that its opening will be out of alinement or registry with the head 38, thus preventing its removal. As the locking-lever 28 is firmly held in the position shown in Fig. 2 by means of the spring 27 engaging the groove 26 in the block 18, it is apparent that the headed. projection 46 on the link 44 cannot be removed from its block. It will therefore be understood that by employing the extensible connection in conjuction with the blocks 18 and 34 a restricted movement of the sashes will be permitted, which movement may be shortened or lengthened by employing one or more links or by shortening them.

If it is desired to use the sash-lock without the extensible connection, it is evident that by moving the locking-lever from the position shown in Fig. 2 to that shown in Fig. 1 the headed projection 46 may be removed from the slot 23 in the block 18 through the opening 25, when by raising the lower sash, which will be permitted by again turning the lever 28 to the position shown in Fig. 2, the link 42 may be disconnected from the headed projection 38 on the block 34, and the extensible connection thus remove d.

It will be observed by reference to Figs. 1 and 5 that there is suflicient space between the adjacent edges of the block 18 and plate ICC to permit the link 44 to be raised so that its head 46 will be disengaged from the slot and opening 25 after the lever 28 has been turned to the position shown in Fig. 1 of the drawings.

When the extensible connection has been dispensed with, it is apparent that the sashrails 15 and 16 may be locked together when flush by simply turning the lever 28 from the position shownin Fig. 2 to that shown in Fig. 1, in which operation the shoulder 32 on the lever will engage the beveled and curved edge 41 of the plate 40 and also that the spring 27 on said lever will engage the recess 39 in the block 34, thus securely holding the parts in position.

Having thus fully described our invention, what we claim as new, and desire to secure by Letters Patent, is

1. In a window-sash lock, the combination with a base-block secured to a sash-rail and having in one of its sides a longitudinal slot open at one of its ends, of a lever pivoted to move horizontally on the upper surface of said block and having a transverse and beveled shoulder on its lower surface, a spring secured to the lower portion of the lever, another block secured to another sash-rail and having in its upper surface at one of its ends a longitudinal groove to engage the spring on said lever and at its other end a headed projection, a horizontallydisposed plate mounted on the last-named block and having a curved edge to engage the shoulder on the lever, and a jointed connection having one of its ends movably locatedin the slot of the lever-block and its other end loosely mounted on the headed projection of the other block, substantially as described.

2. In a window-sash lock, the combination with a base-block secured to a sash-rail, of a lever pivoted to move horizontally on the upper surface of said block and having on its lower surface a transverse and beveled shoulder, a spring on the lower portion of the lever, another block secured on another sashrail and having a groove in its upper surface to engage the spring on said lever, a horizontally-disposed plate on the last-named block and having a curved edge to engage the shoulder on the lever, and an extensible connection uniting the two blocks, substantially as described.

3. In a window-sash lock, the combination with a base-block secured to a sash-rail, of a lever pivoted to move horizontally on the upper surface of said block and having on its lower surface a transverse and beveled shoulder, a spring on the lower portion of the lever, another block secured on another sash-rail and having a groove in its upper surface to engage the spring on said lever, a horizontally-disposed plate on the lastnamed block and having a curved edge to engage the shoulder on the lever, and an extensible connection detachably and movably secured at each of its ends to said blocks, substantially as described.

OKE PEARSON. CARL E. LINDQUIST.

Witnesses:

CHAS. O. TILLMAN, J. R. OSMUR. 

